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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 24 |
| 4 | 2880 |
| 5 | 4838400 |
| 6 | 146313216000 |
| 7 | 97339256340480000 |
| 8 | 1683704371913057894400000 |
| 9 | 873705178746128941669416960000000 |
| 10 | 15414977576506278044562764045746176000000000 |
| 11 | 10334857226047177887548812577909403133201612800000000000 |
[1,2,24,2880,4838400,146313216000, 97339256340480000,1683704371913057894400000, 873705178746128941669416960000000, 15414977576506278044562764045746176000000000, 10334857226047177887548812577909403133201612800000\ 000000] |